The DCL DATATRIEVE command can take a DATATRIEVE command
   or statement as an argument. This allows you to execute a
   DATATRIEVE command, statement, or procedure without
   entering interactive DEC DATATRIEVE. If the
   dtr-command-string contains more than one word, it must be
   placed in quotation marks.

   For example, to invoke the DEC DATATRIEVE procedure REPORT
   which is located in CDD$TOP.JOB, you would enter

     DATATRIEVE "EXECUTE CDD$TOP.JOB.REPORT"